Radiator for cooling liquids.



110.881,392. l i' PATBNTED 11,111.10, 1908. T. 0. PEDDBRS.

RADIATOR FOR COOLING LIQUIDS. APPLICATION FILED JUNE a. 1905.

2 SHEETS-SHEET 1.

' No. 881,392, PATENTBD MAR. 10, 1908.

T. @.PEDDERS- y RADIVATOR FOR COOLING LIQUIDS.

APPLICATION FILED JUNE a. 1905.

2 SHEETS-SHEET 2.

UNITED sTATEs PATENT oEEroE.

THEODOR C. FEDDERS, OF BUFFALO, NEW YORK.

:aanra'ron roajcooLm'G moms.

Specification of Letters Patent.

Patented March 1o, 190s.

application mea mi s, 1905. snm m. saam.

To all whom it rmay concern:

Be it known that I, THEoDoEC. FEDDEEs,

a citizen' of the United States, residing at Which are open at their ends to the atmosphere and are separated by narrow flow spaces for the water to be cooled. It is'important in radiators of this kind that the metal of which the tubes are made, cop er, for instance, should be as thin as -poss1 le, consistent with strength andrigidity, in order to give the tubes a proper capacity for conducting heat.

The object of this invention is to construct the rad tor in such manner that very thin metal can used for the tubes and that the tubes, nevertheless, will be stiff and rigid and preserve their form, and will furnish a large radiating surface.v v

I ,/In the accom anying drawings, consisting of two sheets: igure 1 isa front elevation of' a radiator provided 4with my improved tubes, the latter having their l es 'varranged vertically. Fig. 2 is a vertica transverse section through one o`f the upper corners ofthe radiator, on an enlar ed scale. Fig. 3^is a horizontal section in lgine 3 3, Fig. 2. Fig. 4 is a vertical longitudinal section in linev 4'-4, Fi 2.- Fig. 5 is asimilar section enlarged. 6 is a fr mentary top planof several ofthe tubes. ig. 7 is a fragmentary perspective view of. one of the tubes. 8 is a fragmentary perspective view of one of the filling pieces. Fig. 9 is a front elevation of one of thelower corners of a-radiator having the tubes arranged with their anges horizontally. Figs. 10 and 1l are ers ective views 'of the sheet metal blanllgs o which the flanged tubes are formed. F' 12 is a' front elevation of` alnumber of ltu which have no side 13 1s' aragmentary perspective view of one of thesctubes. j v Like letters of reference refer to like parts in the several gures.

The frame of the radiator may be ofany vusual or suitable form and construction and comprises, as shown, an upper water inlet chamber A, a lower water exit chamber B, and upright side pieces C, forming together aframe which has a rectangular inner s ace in which `thestack of horizontal tubes is arra ed. These tubes are square or rectangu ar in cross section, open at their front and rear ends to the atmosphere, and are arranged preferably in horizontal rows with` the tubes in one row standingl opposite the spaces between the tubes in t e'next upper and lower rows, so that the upright water assages between the tubes are staggered.

e tubes have plain end portions e and are provided between these end portions with transverse grooves or channels f which are preferably of shallow, concave form in cross section.

Inthe preferred construction of the tubes, represented in Fi 1-11, each tube is formed of-two blan G G', Figs. 10 and 11, bentto form flanged channels which, 'when secured.' together by their flanges, form a four-sided tube having projecting, longitudinal langesh at the middle of' twofopposite sides. Eachfof the blanks G G is transs versely groovedor corrugated, as shown at f, between the plain end portions e and has plain side portions g g,respectiv`ely, which, when secured together,A form the flanges h. The plain side portions of one blank are so much Wider than the plain side portions of' tically or horizontallybut the vertical arrangement is preferred because it produces a more ronounced staggering of the How passages tween the tubes. A

The spaces between the inner side of the radiator Jframe and the adjacent rows of tubes from which the iianges h"project.to i' ward the frame are closed by metallic filling. .strips l which are fitted.. with their outer sides. against the frame and with their inner side against the'tues and are rovided on their inner sides wit slots 'i for t e' reception of'the flanges. the frame, or otherwise secured thereto, and practically form parts of theframe. The end portions of the tubes are soldered to these strips. When thetubes Iare arranged These strips are soldered to p with their lian es in a perpendicular position, as shown in igs'. 1-8, the uppermost and thelowermostrows of tubes have their fianges projecting toward the frame and are secured to these filling strips, which latter are arran ed horizontally against the inner sides .of t e front and rear walls of the upper and lower water chambers. When thetubes are arranged in vertical rows and with theirl lianges horizontally, as represented in Fig. 9, the filling pieces are arranged vertically against the inner sides of the upright side pieces C of the frame. The spaces at the ends of those rows of tubes which do not extend quite to the frame may be lilled with chan- 'nel pieces D `The spaces between the plain ends e of the tubes and the spaces between the longitudinal edges of the outermost tubes -at the sldes of the stack of tubes are closed by solder', so that, when the stack of tubes is secured in the rectangular opening of the 'framed the up er water chamber A will communicate with the llower water chamber B only through the flow passages between the tubes. The plain ends ofthe tubes are secured tol-theframe of the radiator by soldering. 'The flow passages between those iportimtis of the'tubes 'whic are not se arate by. the ilanges h are divided by the si sof opposin grooves or fchannels'nto numerous sm spaces, eachof which is practically inclosed ,by 'the metal of ar'acent tubes, and thr'ou h which. the=water Qws in small thread` -e bodies.l W'lien the ianges are arranged vertically-,as chown in Figs. 1-11, the horizontal portions. of the tubes lare. in direct conf .tact bymeans of the ridges between theirV grooves; or channels, while the upr' ht portions .of the tubes are separated by t e interposed flanges.; These flanges -cover the .grooves or channelslnthe up ht sides of the grooves part way and divi e` each ilow s. ace into two parts which unite ,into vone ow space between those upright portions of the'tubes whi h are .not-'covered `bywthe flanges.' Thetrans'versegroovesor channels stlen the tubes', increase the radiating sur vfact.'enablethe tubes to yield under these-- tion of freezing, and support the tubes at numerous points' in'their o'rIl` h when 4asseme y ,longitudinal flanges further increase lthel stiffness of 'the tubes and theistrength and rigidity 3f the. assembled stackof tubes.'- ,T-hese qualiteet.y

"f 'the tl-*bes Permit ha use. Gf @mentiras-:g

thin sheet metal, whereby tne cooling capacity is increased, and the formation of the tubes from flat blanks having their longitudinal edges connected by seams also aids in permittmg the .use of very thin sheet metal.

In the construction vof the tubes represented in Figs. 12 and 18, each tube D1b is made of a single blank of sheet metal which has its longitudinal edges secured together by a lock seam k arranged on the inner side o the tube and preferably soldered to insure ti htn'ess. These tubes rest against each ot er with their plain end ortions e, where they are secured together y soldering, and they also rest against each other at intermediate points by the ridges between the grooves or channels f. The end portions of vthe outermost tubes are secured to the frame and filling pieces. are not required.

I claim as my invention:

.Y 1. A radiator comprising open-ended prismatic tubes having plain end portions by having between said end portions alternatin ychannels and ridges which are arrange crosswise with reference-to the lo `tudinal dimension ofthe tubes, substantia y as set Jforth.

' 2. A radiator tube composed of two channel-shaped Vparts having their longitudinal flanges seamed together and having between .which the tubes rest against each other and said l,flanges alternating channels andl ridges tudinal flanges andfhavlng between said en portions alternating channels and ,Aridges which are arranged crosswise withreference to the longitudinal dimension of the tubes, and slotted strips arranged between the tubes and the frame, substantially as set forth. .y

.Witness my hand this first day of June, '1905. N

THEODOR G. FEDDERS.

I Witnesses: EDWARD C. Hann,

B. HORNBEGK. 

